Remember Mashable and Techcrunch is WordPress based website. And they have google buzz for they own sake.

So make google buzz with our style.
Just simple code

<a rel=”nofollow” target=”_blank” href=”http://www.google.com/reader/link?url=<?php the_permalink();  ?>&title=<?php the_title(); ?>&snippet=<?php the_excerpt(); ?>&srcURL=<?php echo get_settings(‘home’); ?>” Title=”Share this via Google Reader”><img alt=’Buzz this’ border=’0′ class=’icon-action’ src=’http://lh6.ggpht.com/_aQ9isAh6Od0/S3Qrot-P2VI/AAAAAAAACbE/2DbNV1dp9tw/google-buzz.png’/></a>

Done you can look at my blog for example.